Cake compressor



April 30, 1929. RYANT I 1,711,039

CAKE 0 OMPRES SOR Fild June 12, 1926 anoeutoz Carre/ C 5/ 0/17:

Patented Apr. 30, 1929.

UNITED STATES CARREL C. BRYANT, OF LANDING, NEW JERSEY.

CAKE COMPRESSOR.

Application filed June 12,

In the patent to Arthur Wright and Franl: Young No. 1,472,574: dated Octo; her 30, 1923, there is disclosed a process and apparatus for removing adeposit trom the surface of a deposit forming instrumentalitv and preserving it in a form in wh ch it may be etlectively dried or otherwise treated or handled. The invention is there illustrated as applied to a rotary drum filter and involves, in one embodiment, the building up of filter cake about a re-enforcing medium and its maintenance substantially intact for traniisportation away from the lilt i. In the apparatus disclo d in the part out the action ol the re-entorcing instrumen 'l'ality is rendered more efficient by density ing br compressing the filter cake and conu pacting it upon the IQETlfOI'CQIHQBlL An endless belt is presed against the surtace ot the cane by rolle thereby compressing or denritying the cake, rendering it homo geneous and uniform, by forcing solid particles of the cake into the voidslet't by the liquid withdrawn by the filter and causing the cake to be securely bound in the interstices of the re-enforcing medium. Vhile theoretically and under ideal conditions the filter calm 'l 'ormed on the periphery oi? a liltcr drum is of constant thickness or depth, in, COlllHl-ltltll operations the depth sometimes varies dueto a diil'ercnce, in the rate ot dcnoslt o"? the particles from a variety oi? caiises. The present invention seeks to provide calze com n'essing instrimicntalitics which shall conform substantially to the sur are of a cake even though of irregular depth and apply a unifi in pressure therrto. Accord the compressor belt is caused to press a unst the V "are of the calm by means of an axially flexible roller 'apable ot conforming to the configuration of the cake. lrlore particularly the roller comprises a plurality of separate rollers or relatively short transverse dimensions independently displaceable toward and away from the cake. Preferably there are disposed upon a transverse pivoted shaft a plurality of separate discs of substantially the same diameter having axial apertures of a diameter greater than the diameter of the shaft so as to permit relative displacement o't proximate discs in conformity with the variations in the surface of the cake.

In order that the invention may be clearly understood the same Will 110W be described 1926. Serial No. 115,536.

with greater particularity in connection with the accompanying drawings illustrating a preferred embodiment thereof, in which:

Figure 1 is a view in side elevation showing so much of a. rotary drum type filter as is necessary to an understanding of the invention shown applied thereto.

Figure 2 is a viewtakcn in the planeindicated by the line 2-2 in Figijlre ing in the direction of the arrows, and showing, partly in section, the flexible pressure roll automatically adjustable to varying depths of filter cake.

As described in the patent the filter cake (1 forms on the surface of the lilter cloth 6 upon the periphery of the filter c and in the interstices oi the re-entorcement (l by the deposit ot' the solid particles thereabout. It is densiliod or compressed and rendered homogene-tars and uniform by passing solid particles into the voids left by the liquid removed by the filter and caused to be securely bound in and about the re-enforcement by a continuous belt at traveling about idlers e supported fronr the frame and pressed against the surface of the cakeby the rollers g. These rollers are shown as journaled in arms 72. pivoted on the frame as at f and may be spring pressed against the belt or weighted to the desired degree to obtain the requisite pressure. Rollers g or either one of them, are substantially flexible direction in order that they n'iay conform to the surface of the cake cien though its surtace is irregular due to an unequal rate of deposit of the particlesof which it is formed whereby every portion of the cake may be subjecteiil to the nruiisite compressive action. As illustrated the roller is formed of a plurality of discs or annuli g oil substantially equal diameter rotatably carried by a transverse shaft '5 carried by the ends of the arms h and n'e'terably secured against rotation by the pins i. The discs are formed with a central aperture 9 for the passage of the shaft 2" of a diameter greater than the diameter proportioned as to permit a predetermined degree of eccentric motion or radialdisplacement so that the discs may follow the changes in the surface of the filter cake and contact with it for densifying action at all times.

In the preferred embodiment, the annuli of the shaft, the internal diameters of the annuli being so 1, lookin an axial are positioned on the shaft by means of the flanges 7! formed on the ends of the arms /1. Obviously idling washers may be substituted therefor as shown at the left of F igure 2 at H.

By the construction described a flexible roller has been provided which will exertauniform pressure upon a surface even though difli'ereut points on the surface be at varying distances, respectively, from the normal axis of the roller.

Various modifications may be made in the configuration ot the co-operating parts without departing from the spirit and scope of the invention as set Forth in the appended claim.

lWhat I claim is:

In combination, a rotary drum type filter having a frame and a drum upon which filter cake is deposited, rollers carried by the frame, an endless compressor belt carried by the rollers and adapted to Contact with and compress the filter cake located upon the filter drum and local axially flexible compression rolls contacting with that portion of the endless belt which is in contact with the filter alto on the filter drum and thereby densifyiug and compacting the filter cake, said rolls comprising transversely extending shafts pivotally carried on the frame and a plurality of relatively thin aunuli of substantially thesame external and internal diau'ieters carried by the shaft, the internal diameters of the aniiuli being materially greater than the diameter of the shaft whereby the roller can follow irregularities in the filter cake, and applies substantially uniform pressure to all parts of an irregular tilter cake,

This specification signed this 10 June A. D. 1926.

(BARREL C. BRYANT.

day of 

